Here you can find the source of toHex(byte[] array, int offset, int length)
public static String toHex(byte[] array, int offset, int length)
//package com.java2s; /*/*from w w w. jav a2s . c om*/ * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class Main { public static String toHex(byte[] array) { return toHex(array, 0, array.length); } public static String toHex(byte[] array, int offset, int length) { StringBuilder sb = new StringBuilder(length * 4); for (int i = 0; i < length; i++) { int b = array[offset + i]; sb.append(String.format("\\x%02X", b & 0xFF)); } return sb.toString(); } }